Improvement in dies for forming the heads of screw eyebolts



UNITED STATES PATENT QFFICE.

EBENEZER H. PLANT, OF PLANTSVILLE, CONNECTICUT.

IMPROVEMENT IN DIES FOR FORMING THE HEADS OF SCREW EVEBOLTS.

Specification forming part of Letters Iatent No. 118,879, datedSeptember 12, 1871.

To au whom it may concern:

Be it known that I, EBENEZER H. PLANT, of Plantsville, in the county ofHartford and State of Connecticut, have invented a new Improvement inDies for Forming the Heads of Screw Eyebolts; and I do hereby declarethe following, when taken in connection with the accompanying drawingand the letters of reference marked thereon, to be a full, clear, andexact description ofthe same, and which said drawing constitutes part ofthis specification, and repre sents, in

Figure l a view of the construction as heretofore produced 5 Fig. 2, myimproved screw-eye; Fig. 3, a top view oi' the lower dies; Figs. 4 and5, perspective views of the two parts of the lower die, Fig. 6, a faceview of the upper die; and in Fig. 7, a section of the same. l

This invention relates to an improvement in the construction of what aretermed screw-eyes, generally employed as an eye, with which is combineda ring to be attached to hitching-posts, the ring passing through theeye. Heretofore Y these eyes have been made by drawing down the eye endand bending over to form the eye, and welding the end thus bent onto thebody. In this construction the eye is formed as seen in Fig. l, notround in form but requiring considerable labor for its production. Theobject of my invention is to simplify this construction and produce aneye round and symmetrical. To this end it consists in the constructionof dies, as more fully hereinafter described, to form the head upon thebody without welding.

Ais one part and B the other partof the lower die, each part recessed,as at O, to receive the body -part of the blank upon which the head isto b e formed. At the upper end of the recess another recess, D, isformed for the lower portion of the head. The upper die E is formed witha recess, F, corresponding` to the other portion of the head.

The two parts A B of the die are arranged as in Fig. 3, and betweenthese the blank is placed and held with a portion projecting abovesuiciently to form the head. Onto this projecting portion the other partE of the die is struck down with sufficient force to upset the metal andform the head solid. The head is then punched to make a perforation, t',as seen in Fig. 2.

By this construction the eyes are produced of much better form, morenished in appearance, and at less cost than as heretofore produced.

With that class of eyes with which a ring is to be combined the wire ispassed through the ring and welded in the usual manner.

I claim as my invention- As an improvement in dies for forming the headsof eye-bolts, the cavities C, D, and F, of the forms substantially asshown in the die-blocks A, B, and E, represented in the drawing.

Witnesses: EBENEZER H. PLANT.

E. P. Horcnkrss, G. A. Horcnmss.

